Differential motion for traversing card grinding rollers



Dec. 23, 1930. J. DRONSFIELD 5,

DIFFERENTIAL MOTION FUR TRAVERSING CARD GRINDING ROLLERS Filed Jan. 5. 1929 2 Sheets-Sheet 1 Has: 2"" 7 f 2 q :5 :1 1111.4. 2 16.5. 6 2%; 1 j 5 i d i v H 5 r 8 |1 {5 f /fi 2 6 :1

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Dec. 23, 1930. J. DRONSFIELD 1,785,731

DIFFERENTIAL IOTION FOR TRAVERSING CARDGRINDING ROLLERS Filed Jan- 5, 1929 2 Sheets-Sheet 2 N v E N T 08: Camus firons/le/z/ 2 15 ATTORITY$ Patented Dec. 23, 1930 7 1 785 731 I, I

* UNITEosTAT s PATENT OFFICE '4 p I I it JAMEs nnonsrrnmo, or OLDHAM, ENGLAND DIFFERENTIAL .MOTTQN,FOR- TRAVE RSING CARD GRIFIDING ROLLERS Application filed. January 5, 1929, Serial No. 3;:0553, and in Great Britain March 24, 1928.

This invention relates to adiflerential n1otric carrier; This intermediate wheel has tion for card grinding rollers of the type also an external ring of teeth having teeth wherein the said card grinding roller is travin mesh with the teeth of an internal ring .er'sed backwards and forwards along a reof teeth on the shell or enclosing casing for :5 volvable slottedtubeor cylinder by the acthediiferential gear, the boss of said shell or 55 tion of an enclosed right and left'handed casing being removably fixed on the right screw-threadedsliaft which acts on an enand left hand screwed shaft of the Horsfall gaging butterflyfiQinconnection with the grinder the end of which emerges from the card grinding roller, such principle of travboss or sleeve of the tube or cylinder upon 1 ersing a card grinding roller being well which the grinder traverses] Such a motion 0 known. Enclosed differential motions for can be most compactly arranged within a obtaining the differential speed of rotation housing, will give a suitable traverse, will offthe right and left handed.screw-threaded run noiselessly,'has no sliding parts and by shaft are also wellknown. a I 7 an interchange of the end plate carrying the A motion of this kind was described'in a eccentric and of the intermediate wheel with 65 prior. United States patent granted to me, internal and external ring of teeth a 'varia- No; 500,322. In this former patent, use was tion in speed can be arranged for, using the made of an enclosing casing with internal same externally toothed driver and the same teeth, an externally toothed wheel, two ecshell with ring of internal teeth;

centrics, one of half the eccentricity of the I will now describe what I consider to be an other, a driver, and a transmitter. extremely compact and simple construction This difi'erential motion'has had a considof differential gear for the purpose indicated erable vogue, but I now find it desirable to and according to the inv ntion as t t improve "upon the same, as with developabove, and this construction is illustrated in mentsin grinding, it is necessary to arrange the accompanying drawings, wherein: for quicker'spee'ds or greater ranges or 'rela- Fig. 1 shows a sectional elevation of the tive variations in speed, which, with the complete differential gear. .hitherto known arrangements, has not, been Fig. 2 is a section of the shell or enclosing so convenient. If the wheel size be increased casing. to get greateruvariationsin speed then the Fig. 3 shows a separate view of a bind to length of grooves in the driver and transmitins ring. ter have, necessarily to be increased and it Figs. t and 5 are two views of the externally has been found that the swivel studs on the toothed driver. transmitter are aptto wearthe grooves un- Fig. 6 is a separate section of the interduly in practice. There are other difficulties mediate wheel with internal and external encountered. 5 ring of teeth. The object of my invention is toproduce Figs. 7, 8 and 9 are respectively outside an encloseddifierential gear for the particuend elevation, section, and inside end elevalar purpose related andwhich is akin to the tion, of the eccentric carrying end plate which former United States patent but wherein also makes good, the enclosure of the gear all sliding parts are done, away with, there when, the shell or enclosing casing is applied is only onefleccentricity, and wherein there as shown by Fig. 1.

are no, swivel studs or grooves, the variable I pref-er to use an eccentric carrier such speeds desired being obtained-by a combinaas will constitute the inner wall of the cylintion including an externally toothed driver drical housing for the differential gear and 1 (located on the bossor sleeve of the enclosthis element isvery clearly shown at Fig. ing tube or cylinder oftheHorsfa-ll grinder) 1, and separately by the Figs. 7, 8 and 9. It which gears with an internal ring of teeth is marked a and has a bored boss at to fit on anintermediate wheel carried on one ecthe sleeve h of the slotted enclosing tube or centrijecomhined with an end plate or eccencylinder 72. on which. the grinding roll tr'av- 1T3 tioning'and to prevent rotation of the end* I may make other equivalent pro- 7 plate a. vision to this end. 7

On the inner face of this end plate, is an outstanding ring a3.which is eccentrically disposed. and carefully machined Upon this outstanding ringuB sits the in I a a from two centres, one belng the centre or termediate wheel 6, which is'alsomachined to produce a deep circular recess 53 on; the

inner face; this'deep circular recess to fit on the eccentrically disposed outstanding ring a3. The intermediate wheel 6 has an internal ring of teeth: 6 and an external ring of teeth 62. y a a I i on the aforementioned sleeve 71 is applied a drivingpinion 0 (shown by Figs. 4 and 5) with external ring of teeth 0 to mesh with a number of the teeth of the internal ring of teeth I) on the intermediate wheel. 5, and this driving pinion c has an outwardly directed boss 03 which is split for instance. at two places a l, 04:. On this boss fits a plain ring d of some depth and this has a pinching screw (52 the screwed shank of which fits a tapped hole d in the ring (Z. This plain ring d positions the intermediate wheel, I), and this pinching screw d2 clamps the split boss 0 and makes it bite and grip the sleeve 73 so as to fix the pinion 0, and thereby, the several elements of the gear group are properly loparts a, b, 0 and d cated on the sleeve and the properly positioned. i There is provided a shell 7 with bored boss 7 and internal ring of teeth with which some of the outer ring of teeth Z22 on the intermediate wheel 6 gear, and the boss f of such shell is fixed on the'revolvable shaft 8 passing through the sleeve h, the part of the revolvable shaft .9 enclosed within the tube or cylinder 72 being cut with the known right and left-hand screw thread.

Thus, when the tube or cylinder h for the traversing grinder is driven, its sleeve 71. acting through the enclosed gears 0, 72', 62, f2, imparts motion to the shell 7" which in turn operates the right and left handed screw threadedshaft s and so drives vthe traversing grinder mounted on the tube or cylinder at a differential speed as required.

In the differential gear illustrated, the driv ing pinion c is supposed to have 30 teeth (0) while the number of the internal teeth on the intermediate gear 6 is 36 (b') and the external teeth number 54: (722) while the number of internal teeth on the shell is 60 (f2). With the sleeve 72. making 800 revolutions per minute, then the right and left-handed screw shaft 8 will make 600 revolutions.

j A change of the eccentric carrying end plate a, for one with different size of outstand-ing ring as, and of the intermediate gear wheel 5 for one with a difierent number a shaft mounted for of teeth, will change the differential speed obtainable from the motion.

The passage ways marked ad, a5, a6 are oil ducts leading respectively to the outstanding a3, to the boss a, and to the under faceof the arm-like extension a2, while the letters a7, a8 indicate machined faces. The

crescent shaped facing a8 is'produced by machining the annular recess in the end plate the motion andthe other centre being that of the eccentric ring a3. This crescent shaped stationary supporting plate, means for fixing said supporting plate against rotation, an eccentric ring projecting from said support-' ing plate, an intermediate pinion having'an annular groove. 1n one face thereof, said groove engaging said eccentric ring, said intermediate pinion having an external ring of teeth and an mternal ring of teeth, a driving pinion having teeth in'mesh with the.

internal ring ofteeth on the intermediate pinion, said driving pinion having a boss,.

a rotatable hollow sleeve passing through said pinions, means for fixing. said boss to said sleeve for rotation therewith, an exterior casing having a ring of internal teeth in mesh with aportion of the external teeth on the intermediate pinion, all of said rings ofteeth being in radial alinement, a rightand lefthand screw-threaded shaftmounted for r0- tation-insaid sleeve and passing through said casing, and means for fixing said casing on said shaft for rotation therewith.

2. An enclosed differential motion for traversing card grinding rollers upon a stationary supporting shell, comprising a supporting plate,

eccentric ring on the inner face of said supportlng plate, an intermediate pinion having an axial groove 1n its face adapted to receive said eccentric ringthereby to support said 3 intermediate pinion for rotation adjacent to the supporting plate, saidintermediate pinion having externaland internal teeth, a driving pinlon providedwith teeth in mesh with the internal teeth of the intermediate pinion,

a sleeve passing throughsaid pinions, means for fixing the driving pinion on said sleeve for rotation therewith, an enclosing casing cooperating with the supporting plate to en close said pinions, said enclosing casing hav 7 ing an internal ring of teeth in mesh with some of the outer teethof the intermediate plnlon, all of said teeth being in radial-alinement, a right andleft-hand screw-threaded passing through said casing, said casing havmeans for holding said, supporting a plate against rotation, an axially extending rotation in said sleeve and ing means for fixing it on said shaft for rotation therewith.

'3. An enclosed dilferential motion for traversing card grinding rollers upon a sup porting shell, comprising a stationary supporting plate, said plate having a boss and an axial extension for fixing the supporting plate against rotation,-an eccentric ring on the'inner face'of the supporting plate, an intermediate pinion having a groove in its face adapted to engage the eccentric ring, said pinion having external teeth and internal teeth, a driving pinion having a split boss, a sleeve carried by said shell and passing through said pinions, a concentric fixing clevice mounted on said boss and having means for fixing said split boss on said sleeve for rotation therewith and for retaining said driving pinion in position, said driving pinion having a ring of teeth in mesh withthe internal teeth of the intermediate pinion, an enclosing casinghaving an internal ring of teeth in mesh with some of the external teeth of said intermediate pinion, a shaft mounted for rotation in said sleeve, and means for fixing said casing upon said shaft for rotation therewith, all of said teeth being in radial alinement.

4. An enclosed diiferentialgear for traversing card grinding rollers, comprising a stationary plate having a sleeve and a fixing extension, said plate being provided with an axially extending eccentric formed on its inner face, an intermediate pinion having an axial groove in engagement with said eccentrio, said pinion being provided with internal and external rings of teeth, a revoluble tube disposed within said sleeve, a driving pinion 'mounted on said tube and having a ring of external teeth, said driving pinion being provided with a splitboss, a clamping ring and stud mounted on said boss and adapted to fix the pinion for rotation with said tube and to position the pinions, and enclosing casing having an internal ring'o-f teeth in mesh with the external teeth of the intermediate pinion, said casing having a boss, a shaft passing through said tube, pinions and easing boss,

and means for fixing said boss to said shaft for rotation therewith, the combination being such that all the teeth are in radial alinement and adjacent to the stationary plate.

In testimony whereof I have signed my name to this specification. I

, JAMES DRONSFIELD. 

